Jun 23

Towns question fluoride use

GRAND RAPIDS, Mich.—The great American assault on tooth decay began here 63 years ago, earning Grand Rapids a special place in the annals of dental history: the first city in the world to fluoridate its public water system.
So it is more than a little head-scratching that fluoride, the chemical widely credited with dramatically cutting cavities and promoting oral hygiene, is having its scientific credentials questioned in the city that literally swallowed it first.
The belated questioning of fluoride in the most unlikely of places stems partly from unsettled questions—some new, some old—about possible links to cancer and thyroid and kidney problems if too much fluoride is ingested. But the push here mirrors a spreading nationwide awareness and re-examination of the health impact of a wide variety of chemicals added to food, health-care products and water, as well as the use of pesticides.